While many different types of closures exist, there is one in particular that can be found on an extremely wide range of products. Screw-on type caps, or continuous thread caps, are used across many different industries and come in many different forms. Bottled water and soft drinks typically use simple, flat screw on caps. But products such as window cleaner or weed killer can use a screw-on cap with a sprayer. Hand soaps may use a screw-on closure with a pump. Other products may use sports caps, flip-top caps or a number of other varieties. However, each of these different types of screw-on caps are sealed by spinning and tightening the closure along the threads on the bottle.

What is a Screw Cap?

A screw cap or closure is a common type of closure for bottles, jars, and tubes. A screw closure is a mechanical device which is screwed on and off of a “finish” on a container. Either continuous threads or lugs are used. It must be engineered to be cost-effective, to provide an effective seal (and barrier), to be compatible with the contents, to be easily opened by the consumer, often to be reclosable, and to comply with product, package, and environmental laws and regulations. Some closures need to be tamper resistant and have child-resistant packaging features. A tamper-evident band is a common tamper warning for screw caps of bottles, for example.

Common Screw Caps

1. Non-dispensing Screw Caps
Non-dispensing screw caps seem like a little simple in structure compared to variant dispensing caps. But this cap is the most commonly used screw cap.

2. Flip top cap
The flip top cap is a member of our plastic dispensing caps family, they come in various sizes, colors, shapes, thickness and patterns so as to give wide options to choose.3. Flip spout cap
The flip spout cap is one of the oldest design of dispensing caps, this type of closures could work well for several industrial applications, very easy to use

4. Twist Top Cap
Normally, every kind of dispensing cap has their certain application sector, it is important to select the appropriate orifice/opening for the product being dispensed.

5. Disc top caps
Disc top caps are very useful to our daily life, you can see commonly this dispensing cap for shampoo and personal care products, or other similar products, you press on one side.

6. Push/pull caps
Push/pull bottle caps are always used in sports bottles and dish detergent packaging. Each push/pull cap consists of a threaded base and a plastic spout, pull upward the spout to open and push down the spout to close as just like its name.

7. Trigger Screw Cap
Triggers cap are both good for household use or professional use, you twist the nozzle to open before you use it, the length of trigger could be trimmed as you want.

8. Mist Spray Screw Cap
The mist spray cap has a variety of solutions available, they feature an easy way to use similar to plastic pump, great for cleaning, travel, perfume, and many other liquid substances.

9. Pump Screw Cap
The plastic pumps are commonly seen in our daily life, many types of pump caps, including foamer pump, airless pump, lotion pump, treatment pump, etc.

10. Child-resistant Screw Caps
Child-resistant screw caps (also referred as CR caps) are designed to prevent the children from potentially ingesting dangerous items, so child-resistant caps have been usually used in package drugs, cosmetics, and household chemicals or other hazardous products.

11. Tamper-evident Screw Caps
You can see tamper evident caps or tamper resistant caps are commonly used in beverage, food, and pharmaceutical market.

12. Metal Screw Caps
Metal screw caps are mostly suitable for food, medicine and other industries. The most common are olive oil and lug caps for sauces, For lug cap capping machine please see: Lug Capping Machine: The Ultimate Guide.

What is a Screw Capper?

A screw capper is used to securely apply plastic or metal threaded caps and other similar screw closures to bottles or containers at low and extremely high speeds. Not only can screw capper save a product line time and money, cappers also contribute to maintaining a sanitary work space.

Types of screw cappers based on the capping method

Each of different types of screw-on caps are sealed by spinning and tightening the closure along the threads on the bottle. Given this similarity, there are basically two ideal solutions for applying screw-on closures and for most projects, either machine will work.